Ada, interruption, layout and link

[Mildred Ki'Lya]

On 03/24/2010 05:46 PM, Nicolas Boulay wrote:
> I have quickly see that Ada have a way to describe memory layout (like
> mapping) and to declare interrupt handler.
>
> Does anybody have a manual which explain how it is done ?
>
> Lisaac have the section mapping and interrupt. but miss "bit" layout.
> I would like to see the Ada syntaxe.
>   

for My_Type'Size use 3;  --  3 bits wide

for Record_Type use
    record
        Field_1    at Byte_Num * Word range Low_Bit .. High_Bit;
        ...
    end record;


Where Byte_Num is the offset in bytes (starting at 0) and Low_Bit ..
High_Bit is the bit range in the byte.


As for interrupt handlers, they are just functions with the pragma
Interrupt_Handler. And to attach them to an interrupt, the standard
package Ada.Interrupts can be used.


http://en.wikibooks.org/wiki/Ada_Programming/Representation_clauses
http://en.wikibooks.org/wiki/Ada_Programming/Attributes/%27Size
http://en.wikibooks.org/wiki/Ada_Programming/Attributes/%27Component_Size
http://www.adaic.org/standards/05rm/html/RM-13-3.html
http://www.adaic.org/standards/05rm/html/RM-13-5-1.html
http://www.adaic.org/standards/05rm/html/RM-C-3-1.html#I6677
http://www.adaic.org/standards/05rm/html/RM-C-3-2.html#I6697
/usr/lib/gcc/*linux/*/adainclude/a-interr.ads


Mildred

-- 
Mildred Ki'Lya
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